Changed system for Windows 8.1. I can not activate Google Bot v3.3.1.

Changed system for Windows 8.1. I can not activate Google Bot v3.3.1.

Hi
I reformatted the computer and put new system Windows 8.1.
But now I cannot activate Google Search Bot v3.3.1. At me does not accept a key. Writes that this key is already used. What should I do? How I can receive a new key?
Sergey